Reflectx2 makes spells stronger when they're reflected off you. I'd say the best combination is have Dagger use reflect on herself or any one else and then have Vivi cast Flare off that person. It usually does 9999 damage. About Dead Peppers you find them in Chocobo Hot and Cold when your chocobo turns red. You can also get 99 from a chocobo in Chocobo's Paradise.